Which of the following describes the motion of the sound source?

By Allen Kazadi

You stand at x = 0 m, listening to a sound that is emitted at frequency f0. The figure shows the frequency you hear during a four-second interval.

Which of the following describes the motion of the sound source?

A. It moves from left to right and passes you at t=2s.

B. It moves from right to left and passes you at t=2s.

C. It moves toward you but doesn’t reach you. It then reverses direction at t=2s.

D. It moves away from you until t=2s. It then reverses direction and moves toward you but doesn’t reach you.

Answer:

D. It moves away from you until t = 2s and then reverses direction and moves towards you but doesn’t reach you.

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